Prosthetic valve element



FIG. 1 is a perspective view from above of the prosthetic valve element embodying our new design;

FIG. 2 is a perspective view from the bottom thereof;

FIG. 3 is a front side view thereof, the right side, left side and rear side views appearing the same;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a top view thereof. 

CLAIM The ornamental design for a prosthetic valve element, as shown and described. 